The nurse assessing a premature newborn infant auscultates a continuous machinery-like murmur.
This finding is associated with which congenital heart defect?
Pulmonary stenosis
Patent ductus arteriosus
Ventricular septal defect
Coarctation of the aorta
The Correct Answer is B
This is because a patent ductus arteriosus is a congenital heart defect that involves a defect in which the fetal shunt between the aorta and the pulmonary artery fails to close. This causes a continuous machinery-like murmur that can be heard on auscultation.
Choice A is wrong because pulmonary stenosis is a narrowing of the pulmonary valve or artery that obstructs blood flow to the lungs. It causes a systolic ejection murmur that is best heard at the upper left sternal border.
Choice C is wrong because the ventricular septal defect is a hole in the wall between the ventricles that allows blood to flow from the left to the right side of the heart. It causes a loud, harsh holosystolic murmur that is best heard at the left lower sternal border.
Choice D is wrong because coarctation of the aorta is a narrowing of the aorta that reduces blood flow to the lower body. It causes a systolic murmur that radiates to the back and weak or absent femoral pulses.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Magnesium sulfate is given to women with preeclampsia and eclampsia to prevent and treat convulsions.
Magnesium sulfate is a mineral that reduces seizure risks in women with preeclampsia. A healthcare provider will give the medication intravenously. Sometimes, it’s also used to prolong pregnancy for up to two days. This allows drugs that speed up your baby’s lung development to be administered.
Choice A is wrong because magnesium sulfate does not improve patellar reflexes or increase respiratory efficiency. In fact, it may cause decreased or absent deep tendon reflexes and respiratory depression as side effects.
Choice B is wrong because magnesium sulfate does not shorten the duration of labor. It may actually prolong labor by inhibiting uterine contractions.
Choice D is wrong because magnesium sulfate does not prevent a boggy uterus or lessen the lochial flow. It has no effect on uterine tone or bleeding after delivery.
Correct Answer is A
Explanation
Drying the baby after birth and wrapping the baby in a dry blanket
This prevents evaporative heat loss, which occurs when water on the skin surface evaporates and cools the skin. Evaporative heat loss is especially significant in newborns because they are wet at birth and have a large surface area relative to their body mass.
Choice B is wrong because it addresses convective heat loss, which occurs when air currents blow over the skin and carry away heat.
Convective heat loss can be prevented by keeping the baby out of drafts and away from air conditioners.
Choice C is wrong because it addresses radiant heat loss, which occurs when heat radiates from the skin to cooler objects in the environment.
Radiant heat loss can be prevented by placing the baby away from the outside wall and the windows.
Choice D is wrong because it addresses conductive heat loss, which occurs when heat transfers from the skin to cooler objects in contact with the skin.
Conductive heat loss can be prevented by warming the stethoscope and the nurse’s hands before touching the baby.
Normal body temperature for a newborn is 36.5°C to 37.5°C (97.7°F to 99.5°F).
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